u-boot/board/dhelectronics/dh_imx8mp/common.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2022 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <asm/io.h>
#include <asm-generic/gpio.h>
#include "lpddr4_timing.h"
DECLARE_GLOBAL_DATA_PTR;
u8 dh_get_memcfg(void)
{
struct gpio_desc gpio[4];
u8 memcfg = 0;
ofnode node;
int i, ret;
node = ofnode_path("/config");
if (!ofnode_valid(node)) {
printf("%s: no /config node?\n", __func__);
return BIT(2) | BIT(0);
}
ret = gpio_request_list_by_name_nodev(node,
"dh,ram-coding-gpios",
gpio, ARRAY_SIZE(gpio),
GPIOD_IS_IN);
for (i = 0; i < ret; i++)
memcfg |= !!dm_gpio_get_value(&(gpio[i])) << i;
gpio_free_list_nodev(gpio, ret);
return memcfg;
}